The 49ers are starting to collect some impressive talent on the defensive side of the ball. DE DeForest Buckner is a stud. So is young MLB Reuben Foster, though he carries off-the-field baggage. San Francisco signed former Seahawk Richard Sherman, who’ll team with Ahkello Witherspoon to give the Niners a credible CB combo. The 49ers ranked 29th in defensive scoring last season, but they’re a good bet to improve on that mark in 2018.